I LOVE snacking or sipping.Some ways I have found to trick myself into having fewer calories-Buy some apples that arent my favourite. Slice one up and leave it on a plate with some honey for dipping.

Grapes

Keep hot/flavoured drinks to hand.

Leave out a bowl of nuts (they are high calorie, but if to focus on eating one at a time its easier. Especially if they need to be peeled.

Play games that punish your wandering hands, like shooters or telltale games.

Unshelled macadamia nuts are literally net calorie negative. Their shells are so hard, you’ll spend a lot of time and energy opening the nuts. The quickest method is to use a sledgehammer on a hard surface. And then you’ve either crushed the kernel to an unrecognisable pulp or the intact nut has shot off in an unpredictable direction and you have to go looking for it.

Whenever I tried doing caloric based dieting I always approached the situation like an investment decision. IE I have this amount of calories per day I never skip breakfast so that is first decision to make. But I base that on what the rest of the day is looking like, am I going out with friends for lunch/dinner, am I lounging about on a day off, etc. With this in mind if I want a snack I either have to stop and think if it is boredom snacking or am I genuinely peckish. If it is the later, I eat whatever it is that is available but portioned in consideration to the rest of the day. I found if I fight a craving it leads to a relapse at a later date (this is for me personally). You just gotta ask yourself is that PB and celery worth investing in right now, in comparison to the rest of the day, or can you wait till one of your main meals? Yes it means you may have to eat less potato chips but I found that I learned how to ration my snacking by eating slower; maddening at first but you get used to it.

My point is, eat what you want just with some consideration before investing.

Though a less preachy answer, I preferred those plain popcorn cakes with a sprits of shoyu to add some flavor that wasn't just one note salt.